I've shot thousands of Cheddite primers in dozens of guns (all doubles, mostly sxs. Some modern, some vintage.) Can't recall a single pierced primer.
The best thing about them now is that they're relatively available. And the price has come down recently. Still a long ways from the days of $25 or so per brick. But realistically, I doubt we'll ever see that again.

Last edited by L. Brown; 09/24/22 06:19 AM.